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How to reproduce: 1) Open Java Platform Manager 2) Add two platform into the manager. 3) Select these two new platforms. 4) Press Remove button. 5) AssertionError exception is shown. java.lang.AssertionError: Illegal number of selected nodes at org.netbeans.modules.java.platform.ui.PlatformsCustomizer.removePlatform(PlatformsCustomizer.java:227) at org.netbeans.modules.java.platform.ui.PlatformsCustomizer.access$100(PlatformsCustomizer.java:56) at org.netbeans.modules.java.platform.ui.PlatformsCustomizer$2.actionPerformed(PlatformsCustomizer.java:155) .................
Reproducible on Linux. However removing them individually works fine.
Only single selection should be enabled. Checking in src/org/netbeans/modules/java/platform/ui/PlatformsCustomizer.java; /cvs/java/platform/src/org/netbeans/modules/java/platform/ui/PlatformsCustomizer.java,v <-- PlatformsCustomizer.java new revision: 1.14; previous revision: 1.13 done